That appears to be the case on a flight this week out of Phoenix-Mesa Gateway Airport.

KTVK-TV reports (http://bit.ly/1bttn5b) more than 150 passengers on an Allegiant plane were forced to sweat it out for 2 1/2 hours Wednesday after a maintenance issue left the plane without air conditioning.

Despite being at the gate, the TV station says passengers were required to stay in their seats.

There was no report of any injuries to the passengers, and it isn’t immediately clear where the delayed flight was headed.